17.64 USE problems
Condition: On a weekday, passenger cars make up 70% of urban transport. On weekends, a certain number of cars leave the city, the rest make up 60% of the transport remaining in the city (only cars leave the city). What part of all urban transport goes into nature?
Problems of the USE (Unified State Exam) - equations and inequalities in terms of a parameter, solved both by algebraic methods and geometric ones.